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use erl_pp::{self, MacroDef};
use erl_tokenize::{Lexer, LexicalToken};

pub trait Preprocessor {
    fn define_macro(&mut self, name: &str, replacement: Vec<LexicalToken>);
    fn undef_macro(&mut self, name: &str);
}
impl<'a> Preprocessor for &'a mut Preprocessor {
    fn define_macro(&mut self, name: &str, replacement: Vec<LexicalToken>) {
        (*self).define_macro(name, replacement);
    }
    fn undef_macro(&mut self, name: &str) {
        (*self).undef_macro(name);
    }
}
impl<'a, T, E> Preprocessor for &'a mut erl_pp::Preprocessor<T, E> {
    fn define_macro(&mut self, name: &str, replacement: Vec<LexicalToken>) {
        (*self).define_macro(name, replacement);
    }
    fn undef_macro(&mut self, name: &str) {
        (*self).undef_macro(name);
    }
}
impl<T, E> Preprocessor for erl_pp::Preprocessor<T, E> {
    fn define_macro(&mut self, name: &str, replacement: Vec<LexicalToken>) {
        self.macros_mut().insert(
            name.to_string(),
            MacroDef::Dynamic(replacement),
        );
    }
    fn undef_macro(&mut self, name: &str) {
        self.macros_mut().remove(name);
    }
}
impl<T> Preprocessor for Lexer<T> {
    fn define_macro(&mut self, _name: &str, _replacement: Vec<LexicalToken>) {}
    fn undef_macro(&mut self, _name: &str) {}
}